Saw-filing machine.



l. MACKINTOSH & W. P. CALLAHAN.

SAW FILING MACHINE.

. APPLICATION FILED DEc.1.19|5. Llm

Patented Apr. 3, 1917.

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1.l MACKINTOSH & W. P. GALLAHAN.

SAW FILING MACHINE.

APPLICATION msn nEc.-1. 19u-5.

Patented Apr; 3, 1917.

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J. IVIACKINTOSH & WI P. CALLAHAN.

SAW FILING MACHINE.V

APPLICATION FILED DEC. l. I9|5 L'Qm Y Patented Apr. 3,1917.

1. MACKINTOSH & W. P. CALLAHAN.

SAW FILING MACHINE.

APPLICATION FILED DE01. 1915.

Patented Apr. 3,1917.

5 SHEETS-SHT 4 1.` MACKINTOSH 6L. w. P. CALLAHAN.y

SAW FILING MACHINE.

APPLICATION FILED nc.1.1915.

Patented Apr. 3, 1917.

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JOI-INIVIACKINTOSH, OF MELROSE, AND WILLIAM I. CALLAHAN, OF OAKLAND,CALIFORNIA.

SAW-'FILING MACHINE.

Application filed December 1, 1915.

To all w/wm t may concern Be it known that we, JOHN MAGKIN'rosH andVILLIAM P. CALLAHAN, citizens ofthe United States, residing at Melroseand Oakland, respectively, in the county of Alameda, State ofCalifornia, have invented a new and useful Saw-Filing Machine, of whichthe following is a specification in such `full and clear terms as willenable those skilled in the art to construct and use the same.

This invention relates to a saw filing machine intended especially foraccurately and uniformly filing saws, the machine illustrated beingparticularly adapted to hand saws, although it will `be apparent that itmay be used for any kind of saws desired.

An object of the invention is to provide a saw filing machine which willreproduce in the saw the curve upon which the teeth are usually cut.

It will be understood bythose skilled in the art that hand saws have thepoints of their teeth on a curve with a radius of a number of feet, thisform having been found to be more suitable than to have the teeth on astraight line. The result of this vnecessitates very careful filing ifthe work is done by hand to prevent the points of the teeth from workingoff the given curve after repeated filings.

Another object of the invention is to provide means whereby the iilingand setting apjiaratus may be adjusted to operate upon any sawregardless of the number of teeth to the inch within certain ranges.

Another object of the invention is to provide means whereby the saw willbe led and the teeth set all in a single operation.

Other objects of the invention will appear as the description proceeds.

An embodiment of the invention is shown in the drawing in which the samereference numeral is applied to the same portion throughout, but we areawarethat there may be many modifications thereof within the scope ofthe appended claims. Y

Figure 1 is a side elevation of thefcomplete machine, a portion of thesaw vise being broken away for purposes of illustration,

Specification of Letters Patent.

Serial No. 64,435.

Fig. 2 is a plan view of the complete machine, the 'saw vise beingbroken oif,

Fig. 3 is a vertical sectional view on the line 3&3, Fig. 1 looking inthe direction of the arrow,

Fig. 4 is a vertical sectional view on the line 4-4, Fig. l looking inthe direction of the double arrows,

Fig. 5 is a view in Vend elevation of the machine looking at the righthand end and showing the arrangement of the gears for driving theoperating shafts,

Fig. 6 is a broken view in side elevation illustrating the saw clamp, v

Fig. 7 is a vertical sectional view of the saw clamp on the line'7-7,Fig. 6,

Fig. 8 is a side elevation of the notched bar which is used fordetermining the amount the saw carriage has moved with each step,

Fig. 9 is an end elevation of the notched bar shown in Fig. 8,

Fig. 10 is a view in edge elevation with one series of the teeth used onthe feed bar,

Fig. 11 is a vertical sectional view on the line 11-1l, Fig'. l, e

Fig. 12 is a side elevation of the cam used for operating the feedlever,

Fig. 13 is a side elevation of the adjusting block through which thefeed lever operates,

Fig. 14 is a side elevation of the feed hook,

Fig. 15 is a perspective view of the quadrant for supporting andadjusting the filing wheels,

Fig. 16 is a broken sectional view showing the top of one of the tablebeams and illustrating the connections for moving the grinding blocks,

Fig. 1.7 is a front elevation of one of the saw setting heads, and

Fig.V 18 is a horizontal sectional view through two of the saw settingheads showing the way the teeth are bent when set.

The numerals 1 and 2 indicate the supporting legs for two longitudinallyextending beams 3 and 4, which beams have guide ways and shafts for theoperation of the several parts of the machine.

The tops of the beams 3 and 4 are curved so that they are higher at thecenter as inra-tenteu apr. e, ieri.

dicated at v upon a suitably large radius to give the desired curve tothe points of the teeth of the saw being operated upon. The

two beams 3 and 4 are spaced apart the width of the two fiat members 6and,7 which Y form the parts of the sawholder, said members 6v and 7having guides 8,' 9 and 10, 11 respectively which move in correspondingslots in the members 3 and 4 and which slots are curved the same as thetop of the v extending longitudinally'the entire length of the two beams3 and 4 on the outside thereof. Mounted on the top ofthe two beams arelfour slidable blocks 18, 19, 20 and 21, which blocks each haveprojections extending into a groove on the outside of each of the beams3 and 4 as indicated at 22 and 23, Fig. 4. The blocks 18, 19 and 20, 21respectively support an arched member 27, 28, each of which members isprovided with two downwardly extending rods 29, 30, 31 and 32, whichrods extend through Vthe blocks 18 to 21 inclusive as illustrated inFig. 3. Each lrod isV surrounded with aspiral spring as indicated at 33,34, which springs bear on collars on said rods as indicated at 35, 36and also bear on the underside of the blocks 18 to 21 inclusive, therebyholding the members 27, 28 normally down.

The beams 3 and 4 are provided with laterally extending lugs 37, 38, 39,40, 41, 42, 43 and 44, which lugs form the bearings for four flat levers45, 46, 47 and 48. It is to be observed that the rods connected with thearched members 27, 28 project downwardly so that'their lower ends bearon the top of onel end of the iiat levers 45 to 48 inclusiveas'illustrated in Fig. 3, and it will also be observed that said rodsextend through elongated slots in the beams 3 and 4 as illustrated at50, Fig. 2, the object being to provide means whereby the position ofthe grinding wheels may be varied sufrieiently so that th-e grindingwheels will properly act upon the teeth of saws of different gages, anadjustment being provided for each arched member as well as for the iftoothed setting'member which is to be later described.

Each arched member 27 and 28 carries a screw as indicated at 51 and 52,the position of said screws being adjusted by means of "-,f therevoluble threaded nut which is carried Vit from being displaced. A locknut 55 with a hand lever 56 is also applied to each screw in order tosecure it in a fixed position with respect to the nut 53,'while each ofthe nuts 53 is secured in a fixed position by means of suitable screws57, 58. Each screw 51, 52 carries a slotted head as indicated at 60 Fig.3 through which screws the curved arms G1 and 62 respectively pass andin each instance as indicated at G3 a set screw is used to secure saidarms in the desired position.

Each of the arms 61 and 62 has a head as indicated at G4 and 65 whichiits into a dovetail slot in the heads 66, 67 which latter carry thestub shafts 68 and 69 on which the grinding wheels 70 and 71 rotate. Thegrinding wheels are driven by pulleys 72 and 73 respectively from anysuitable source of power. The precise position of the heads 06 and 67with respect to the heads G4 and is determined by trial and suitable setscrews 74 and 75 arev used to ix the heads in the desired adjustment.

The saw setting device comprises two blocks 76 and 77 which are mountedon the top of the beams 3 and 4 adjacent one end thereof. These blocksare rigidly secured in a given position by means of set screws 7 G and77 and carry slidable plungers 78 and 79 respectively, which plungersare held out of contact with the saw by means of spiral springs 80, 81and at their inner ends the plungers carry heads 82 and 83, each ofwhich is provided with six series of teeth to correspond with the sixseries of teeth on the feed bar later to be described. The heads 82, 83are set at such an inclination that only the lower portions of theirfaces touch the saw teeth and they are each provided with a shank asillustrated at 84 for securing them in the slidable plungers 78 and 79,set screws 85, 8G being used to hold them in the given adjustment. Theplungers are separable into two parts at 78', 79 which two parts areconnected by screws 7 8, 79.

rIhe plungers 78, 79 are each moved toward the saw by means of thelevers 87, 88 respectively, said levers being pivoted on the blocks 76,77 and having one end thereof extending downwardly into a position to bemoved by the cams 89, 90 on the shafts 14, 17. The block 77 and the twoiling devices are adjusted longitudinally of the bed frame work by meansof the levers 91, 92, 93 respectively, the beam 4 having a groove in itsupper edge which carries lugs depending from the several blocks so thatthey can be connected with the cables 94, 95 and 96. The lever 91operates a pulley 100, the lever 92 operates a pulley 101, while thelever 93 operates a pulley 102, over which the several cables pass,other pulleys 103, 104 and 105 being provided to hold the cables inclose engagement with the pulleys 100 to 102 inclusive. At the other endof the machine the cables nass over three pulleys 106, 107 and 108.

rlhe -lside of f the beam =4 Ais gprovided .with marks which iwillenable the user to know -whereto-lsettheilevers 91, 92, 93 `for agivensaw, `while the yblock 376 isset by hand so that =the positions :of ithe `heads `82, 83 will match the .teeth of the .saw being v operatedupon.

The saw clamp memberoisprovided with an ropening l extendinglongitudinally therethrough lin which there is placed a-heXagonal -bar110, Asaid bar having six different series of teeth to `enable sixdifferent sizes ofsaw teeth to be operated-upon. Themember 6 isslottedonthe'sidefso that the teeth onthe bar v110 are accessible to-thehookL111 on-fa lever 112, a spring 113 holding said hook normally inengagement with theteeth on the bar S110. rllhe hook 111 is disengagedfromfthe bar 110 by means of a lever 114 which Aispivoted to a block 115on the top offthe back beam 3, `the lower end of ls-aidlever beingso-,positionedvas to contact with one end of the lever 112 `and therebypush the :hook out offengagement with the feed `bar when the lever 114is pushed -to the'left, Fig. 2.

Tl1e;lever\116 isfpivotally connected with the lever 112 and `passesthrough a block 117, which block is slidable thereon. The bloc-k 117 haspivot pins 118, 119 and it is mounted in another block 117', which isslidable transversely ofthe member 3, the lever being used to shift it.At the outer-end-the lever has a pin 120 which is movable 1in a slot .inithe underside of a block y121 tovhold` said lever in a fixed positionlongitudinally, `while on its underside the lever =is provided with twosmall rollers 122, 123 which engage opposite sides'of a worm cam 124 onthe Vshaft 17. The block is slidably supported-to move transverselyofthe beam 3 and it ismoved by means of the lever 125, said lever beingpivotally mounted'on a block 126 on the'top of the beam 3.

The object ofthis adjustment isto provide means whereby the throw of thelever -116 may be so adjusted as to move the saw holding visejust onetooth with each turn of the shaft 17 regardless of the preciselength of'the tooth then being workedupon.

The rod 110 has a trunnion 127 at one end which fits into a plug 128which is screwed into the'hole in which said rod fits at one endthereof. At the other end the rod has a `non-circular opening to receivea-pin L129 on a thumb wheel 130. The thumb wheel 13Ois1provided withteeth 131 which lit into notches in the outer end of a threaded plug 132so as to enable any set of teeth on the `feed -rod torbe placed inposition to be o-peratedon bythe feed hook. The rod 129 is held in theposition shown'in Fig. 8 with its V.teeth 130 ynormally in contact withthe plug 132 by means of a spiral spring 133.

.The iresult :of the 'foregoing construction `isithatwhenfit is desiredto turn the rodthe thumb :wheel is pulled out so that its teeth `131fd0not .engage the plug, whereupon the Vrod 110'can'be turned to anydesiredV position after which the thumb wheel is allowed to .rengage thel,plug 132, whereupon the rod will-beiheld in the desired position.

The members V6 and 7 are separated far enoughltoreceive the-saw andareconnected together adjacent the saw visezbyaneans of two pins 134 and135. The saw vise com- ,prises a rplate :136 which is pivotallyconnected to the member 7 by means `of a rod 137, while the llower endof the plate 1361has two Vlevers v138, 139,.the lower ends of lwhichbear on eccentric cams 140, 141. .The cams 140,141 are carried by ashaft '142 which shaft is rotated by means of the thumb lever 143 andthe position of thccams iis such that the saw is rigidly yheld againstthe lmember 6 by the plate or jaw 136 when the .thumb -lever 143 is inthe position shown in Fig. 7 while it releases thesaw vwhenthe thumblever is raised about j 90 degrees. v

` The shaft `14 is provided with a gear 144 while the shaft 17 sprOVidedwith a gear 145 and in ordertodrive the two shafts in precisely theSametime these gears are in turn-connected by two `gears 146, 147 suituably supported kon brackets 148, 149, while -apulley 150 `is 1providedto-transmit power to the machine. At theother end of the shaft 14thereisa-bevel gear 151 in mesh rwltha bevel `gear 152carr1ed bya bracket153, the shaft 154 supporting sait gear havinga.handcrank 155 to enablethe machine-to beoperated by hand when desired.

In ordertoenable the saw clamp to be run L, f

usedto. secure the saw filing members rigidly in place when oncetheyhave been set in the desired adjustment.

The operation of the apparatus is as follows: The saw clamp frame islong enough so thatit can be withdrawn from the machine to the left farenough to allow the saw to be inserted in place as indicated in Fig, 6,whereuponvthe lever 143 is turned down so that the `saw `will be rigidlyclamped inplace. Thereupon the saw hold ing-clamp iis pushed through themachine until some of the teeth will be adjacent each of the saw filingdevices and the saw settingheads, Vwhereupon. the proper adjustmentthereof will be made to correctly 'tile and set the saw. As soon as theadjust- Vments have been made the saw clamp will be 'pushed on throughthe machine until the first'teeth at the heel of the saw will come underthe first filing device. At the same timefthe feed bar will be turned sothat it presentsl 'the proper series of teeth to the feed hook, sothatprecisely one tooth will be advanced with each motion thereof, whereuponthe machine is ready to be started and will completely file and set thesaw without further attention.

It will, of course, be'apparent that all saws will be filed with thecurve or camber of this particular machine, but this may be changed if amachine is to be built for other types of saws.

YVhile the term files7 has been used herein,v it: will be .understoodthat suitable grinding stones may be used in the place of the ordinaryVsteelV Vfiles if desired.

Having thus described our invention what we claim as new and desire tosecure by Letters Patent of theUnited States, is as follows, expressreservation being made of permissible modifications:

1. A saw filing machine comprising a rigid bed having curved guide ways,a saw clamp movable longitudinally through said curved guideways, a pairof revoluble saw iles carried thereby, means to raise and lower the sawfiles to sharpenthe teeth of a saw, means to adjust the position of thesawiiles to be capable of operating on different sized teeth, means tomove the saw clamp through Vthe machine step by step, means to adjustthe step by step movement tocorrespond with the spacing of the teeth ofthe saw being operated on, and means to set the saw while being movedthrough the machine.

V2. A saw yfiling machine comprising a rigid bed, a saw clamp movablelongitudinally therethrough, slidable heads 0n the bed, a revoluble filecarried by each head, means to adjust the position of the saw files tosharpen the teeth of a saw, means to raise'and lower the saw filesintermittently, a reciprocating saw set, means to move the saw clamp andsaw carried therebyV step by step through the machine, and means toadjust the step by step movement to correspond with the spacing ofthesize of the y teeth of the saw.

S. A saw filing machine comprising a rigid bed having curved guide ways,a saw clamp movable longitudinally through said Y 'curved guide ways, apair of revoluble saw files supported upon the bed, means to adjust,theangles'of the saw files, means where- 'by thev supports of the sawfiles may be shifted to accommodate different sizes of saw teeth, a saw,oppositely reciprocable saw sets, means to raise and lower the saw filesand to oppositely reciprocate the saw sets, means to move the saw clampthrough the machine step by step, and means to adjust the step by stepmovement to the spacing of the saw teeth.

4,-. A. saw filing machine comprising a rigid bed, a saw clamp movablelongitudinally therethrough, a revoluble shaft on each side of theJ bed,gears connecting said shafts, a pair of revoluble saw tiles supportedabove the bed, levers pivotally connected to the bed on opposite sidesthereof, pins extending downwardly from the saw iile supports intocontact with said levers, cams on the shafts whereby the levers areoscillated to raise and lower the saw files, means to move the saw clampstep by step through the machine, and means to adjust the step by stepmovement to the spacing of the saw teeth.

V5. A saw iling machine comprising a4 rigid bed, a saw clamp slidabletherethrough, supports on the bed for a pair of revoluble saw files,means to adjust the angle of the saw files, means to adjust the positionof the supports for the saw Iiles to accommodate different sizes of sawteeth, pins extending downwardly from the saw {ile supports, leverscontacting with said pins for the operation thereof, cams in contactwith the levers, means to rotate saidv cams to operate the levers toraise and lower the files, means to move the saw clalnp and saw carriedthereby step by step through the machine, the steps corresponding to thespacing of the saw teeth, a pair of transversely reciprocating saw sets,and means rto reciprocate said saw sets to effect the setting of theteeth of the saw while the saw is moving through the machine.

G. A saw filing machine comprising' a rigid bed having` guide ways, asaw clamp movable longitudinally through said guide ways, a pair ofadjustable blocks supported by the guide ways, a rotary saw file carriedtby each block, a ratchet bar carried by the saw clamp, means to rotatethe iiles, a shaft extending longitudinally of the bed and having camsthereon to raise and lower the saw files, and a pawl for moving the sawclamp through the machine step by step with each movement of the sawiles, and means whereby the distance which said clamp is moved with eachstep may be adjusted to correspond with the size of the teeth of the sawbeing sharpened.

7. A saw filing machine comprising a rigid bed having curved guide waysextending therethrough, a saw clamp slidable in said guide ways,revoluble saw files adjustably supported on said bed, means t0 raise andlower the saw files to sharpen the teeth respond with the spacing of theteeth of a of a saw held by the clamp, a ratchet bar given saw.

carried by the saw clamp, means to raise 'In testimony whereof We havehereunto 10 and lower the revolnble saw files, a paWl to set our handsthis 20th day of November engage the ratchet bar to move the clampA111915.

through the machine step by ste-p, and means JOHN MACKINTOSH. to adjustthe step by step movement to cor- `WILl'JIAil P. CALLAHAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

